feat: Add phone and project details to invitation validation response

- Added phone field to InvitationPublicResponse schema
- Enhanced validate endpoint to return project details when available:
- project_id, project_name, project_role_name, region_name
- Frontend now receives complete invitation context for better UX
- Phone number pre-filled in acceptance form
- Project context displayed during invitation acceptance

src/app/api/v1/invitations.py

@@ -293,9 +293,34 @@ async def validate_invitation_token(
             suggested_first_name = name_parts[0]
             suggested_last_name = " ".join(name_parts[1:])
     
+    # Get project details if this is a project invitation
+    project_name = None
+    project_role_name = None
+    region_name = None
+    
+    if invitation.project_id:
+        from app.models.project import Project
+        from app.models.project_role import ProjectRole
+        from app.models.project_region import ProjectRegion
+        
+        # Get project name
+        project = db.query(Project).filter(Project.id == invitation.project_id).first()
+        project_name = project.title if project else None
+        
+        # Get project role name
+        if invitation.project_role_id:
+            project_role = db.query(ProjectRole).filter(ProjectRole.id == invitation.project_role_id).first()
+            project_role_name = project_role.role_name if project_role else None
+        
+        # Get region name
+        if invitation.project_region_id:
+            region = db.query(ProjectRegion).filter(ProjectRegion.id == invitation.project_region_id).first()
+            region_name = region.region_name if region else None
+    
     return InvitationPublicResponse(
         id=invitation.id,
         email=invitation.email,
+        phone=invitation.phone,
         invited_role=invitation.invited_role,
         status=invitation.status,
         expires_at=invitation.expires_at,
@@ -304,7 +329,11 @@ async def validate_invitation_token(
         is_expired=invitation.is_expired,
         is_valid=invitation.is_pending,
         suggested_first_name=suggested_first_name,
-        suggested_last_name=suggested_last_name
+        suggested_last_name=suggested_last_name,
+        project_id=invitation.project_id,
+        project_name=project_name,
+        project_role_name=project_role_name,
+        region_name=region_name
     )
 
 

src/app/schemas/invitation.py

@@ -113,6 +113,7 @@ class InvitationPublicResponse(BaseModel):
     """Public schema for invitation validation (limited info)"""
     id: UUID
     email: str
+    phone: Optional[str] = None
     invited_role: str
     status: str
     expires_at: datetime